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@cython.final @cython.internal cdef class _MemDebug: """Debugging support for the memory allocation in libxml2. """ def bytes_used(self): """bytes_used(self) Returns the total amount of memory (in bytes) currently used by libxml2. Note that libxml2 constrains this value to a C int, which limits the accuracy on 64 bit systems. """ return tree.xmlMemUsed() def blocks_used(self): """blocks_used(self) Returns the total number of memory blocks currently allocated by libxml2. Note that libxml2 constrains this value to a C int, which limits the accuracy on 64 bit systems. """ return tree.xmlMemBlocks() def dict_size(self): """dict_size(self) Returns the current size of the global name dictionary used by libxml2 for the current thread. Each thread has its own dictionary. """ c_dict = __GLOBAL_PARSER_CONTEXT._getThreadDict(NULL) if c_dict is NULL: raise MemoryError() return tree.xmlDictSize(c_dict) def dump(self, output_file=None, byte_count=None): """dump(self, output_file=None, byte_count=None) Dumps the current memory blocks allocated by libxml2 to a file. The optional parameter 'output_file' specifies the file path. It defaults to the file ".memorylist" in the current directory. The optional parameter 'byte_count' limits the number of bytes in the dump. Note that this parameter is ignored when lxml is compiled against a libxml2 version before 2.7.0. """ cdef Py_ssize_t c_count if output_file is None: output_file = b'.memorylist' elif isinstance(output_file, unicode): output_file.encode(sys.getfilesystemencoding()) f = stdio.fopen(output_file, "w") if f is NULL: raise IOError(f"Failed to create file {output_file.decode(sys.getfilesystemencoding())}") try: if byte_count is None: tree.xmlMemDisplay(f) else: c_count = byte_count tree.xmlMemDisplayLast(f, c_count) finally: stdio.fclose(f) def show(self, output_file=None, block_count=None): """show(self, output_file=None, block_count=None) Dumps the current memory blocks allocated by libxml2 to a file. The output file format is suitable for line diffing. The optional parameter 'output_file' specifies the file path. It defaults to the file ".memorydump" in the current directory. The optional parameter 'block_count' limits the number of blocks in the dump. """ if output_file is None: output_file = b'.memorydump' elif isinstance(output_file, unicode): output_file.encode(sys.getfilesystemencoding()) f = stdio.fopen(output_file, "w") if f is NULL: raise IOError(f"Failed to create file {output_file.decode(sys.getfilesystemencoding())}") try: tree.xmlMemShow(f, block_count if block_count is not None else tree.xmlMemBlocks()) finally: stdio.fclose(f) memory_debugger = _MemDebug()
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